Two elements are found in the same column of the periodic table. You would expect these elements to have

the same number of electrons

very different properties

similar properties

the same atomic mass

All the elements of a family in the periodic table have what feature in common?

Who is having a hallucination? O A. Dominique, who doesn't know who she is anymore O B. Jasmine, who believes that she is a millionaire and is really a princess O C. Damion, who suffers a concussion after a football game and has memory problems O D.

Jack and jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 157.9 seconds (2 minutes and 37.9 seconds), while jill, the faster swimmer, covers ten lengths in the same time interval.

A glass lying on table doesn't possess friction. why?

A 100 N box is placed on an inclined plane that makes a 30° angle with the horizontal. Calculate the component of gravitational force that acts down the inclined plane. A. 25 N B. 50 N C. 87 N D. 100 N

Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer? Electromagnetic waves can carry energy through matter. Electromagnetic waves can travel through empty space.

Why do different elements emit different colors of light

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?